Sentinel - $4.99 (8.4 MB) Fist impressions (I'm playing and I'll update this in the next minutes): Before playing: - it loads fast - 2 game modes: Assault and Endurance (it’s locked) - 4 difficulty levels: easy to psycho - 3 maps (only the 1st is unlocked) - spaceship hud alike interface, quite nice, with a matching background music Playing: - 60 waves (1st map) - pinch to zoom in/out - easy to place towers and a nice animation when it is built - subtle sounds (no annoying sound when a new wave starts) - towers (at least the ones I can play right now) mix to the background texture like in 7 Cities which is not good. After plying more the towers kind of stand out due the animations (good) - upgrades change the tower appearance (great!) - the first map has a barrier to contain the waves (something like an obstacle so aliens have to break it to access the other part of the map) - one of the best tower animations I've seen so far - if you have enough money you can fix structures I'll play it more for sure. Everything feels right about this TD. Very polished. I can't believe it's only 8.4 MB. After playing some minutes (so it's not a review) I have that "I want more" feeling that lacked for me while playing Garden Defender.